Block diamondshape and sharedgenerics tests on #15591 (#15593)

Author: MichalStrehovsky

tests/issues.targets

@@ -166,6 +166,12 @@
         <ExcludeList Include="$(XunitTestBinBase)\JIT\Regression\JitBlue\GitHub_11408\GitHub_11408\GitHub_11408.cmd">
             <Issue>11408</Issue>
         </ExcludeList>
+        <ExcludeList Include="$(XunitTestBinBase)\Loader\classloader\DefaultInterfaceMethods\diamondshape\diamondshape\*">
+            <Issue>15591</Issue>
+        </ExcludeList>
+        <ExcludeList Include="$(XunitTestBinBase)\Loader\classloader\DefaultInterfaceMethods\sharedgenerics\sharedgenerics\*">
+            <Issue>15591</Issue>
+        </ExcludeList>
         <ExcludeList Include="$(XunitTestBinBase)\Loader\classloader\DefaultInterfaceMethods\constrainedcall\constrainedcall\*">
             <Issue>15353</Issue>
         </ExcludeList>

tests/testsFailingOutsideWindows.txt

@@ -71,6 +71,8 @@ GC/Features/BackgroundGC/foregroundgc/foregroundgc.sh
 GC/Features/LOHFragmentation/lohfragmentation/lohfragmentation.sh
 GC/Features/SustainedLowLatency/scenario/scenario.sh
 GC/Regressions/dev10bugs/536168/536168/536168.sh
+Loader/classloader/DefaultInterfaceMethods/diamondshape/diamondshape/diamondshape.sh
+Loader/classloader/DefaultInterfaceMethods/sharedgenerics/sharedgenerics/sharedgenerics.sh
 Loader/classloader/DefaultInterfaceMethods/constrainedcall/constrainedcall/constrainedcall.sh
 Loader/classloader/TypeGeneratorTests/TypeGeneratorTest612/Generated612/Generated612.sh
 Loader/classloader/TypeGeneratorTests/TypeGeneratorTest613/Generated613/Generated613.sh